Every winter, flocks of Siberian seagulls migrate through Delhi making a temporary home in the Ganga and Yamuna, two of India’s most holy rivers. Photographer Navin Vatsa camps out in the early morning light as the birds flock in the thousands, often fed by devotees who arrive to bathe in the river and feed them. The birds fly over 6,000 miles to escape the harsh Siberian winters between October and March. You can see many more photos on Vatsa’s Instagram feed.